Pesticide
Use Has Global Implications for People and Wildlife(Beyond
Pesticides, June 6, 2006) The extent to which persistent
organic pollutants (POPs), including many pesticides, can have far reaching
environmental impacts on wildlife and people from different continents
is becoming more and more evident, according to a United Nations agency
and scientists engaged in a European bird study.

According to the
Gambia
Daily Observer, the United Nations’ Food and Agriculture Organization
(FAO) is involved with the battle in that country against swarming locusts,
which can have a devastating effect on human crops. The FAO recognizes
that “chemical pesticides may have adverse effect[s] on human
health and the environment,” but also recognizes that “desert
locust upsurges can cause significant and widespread crop losses…food
security and export earnings may also be seriously threatened in affected
areas.” The risk of a locust plague therefore needs to be continuously
balanced against the risks of using pesticides.

FAO strives to minimize
the use of pesticides against the desert locust as much as possible
by encouraging intervention in the early stages of the development of
a locust outbreak through its emergency prevention system, or EMPRES.
The system reduces the amount of pesticides to be used when locusts
are only present in relatively small areas. FAO has initiated applied
research into control methods that are less hazardous to the environment,
such as biological control and barrier treatments. The organization
has also assisted governments affected by the desert locust to set up
pesticide management and quality control systems for control operations.

Such efforts to
reduce the amount of pesticides used are important for three reasons.
First, although the Gambia is a signatory to the Stockholm Convention
on Persistent Organic Pollutants, which aims to reduce and ultimately
ban the production and use of harmful pesticides internationally, other
nations on the African continent are not signatories, or have been granted
exemptions from provisions disallowing the use of toxic chemicals such
as DDT for pest control. Second, because of the highly volatile nature
of POPs like DDT at tropical temperatures, these chemicals are capable
of traveling immense distances and do not lose their potency to do harm
as they move. Third, POPs bioaccumulate in plants and animals as they
move up the food chain, making predatory animals and humans likely to
acquire the highest concentrations of these dangerous chemicals.

European scientists
engaged in a bird
study to be published in the journal Biological Conservation worry
that this bioaccumulation may be playing a role in the declining numbers
of migratory birds arriving in Europe from Africa during the nesting
season, and fear that their dwindling numbers may be a warning of widespread
environmental damage. From 1970 to the present, researchers have found
that 54 per cent of the 121 long-distance migrants studied have declined
or become extinct in many parts of Europe. The study also compared migrants
and resident birds with similar characteristics, and in almost every
case, the migrant fared worse. Some experts feel that the huge amounts
of pesticides now used to kill locusts and protect crops in Africa may
be playing a role in the destruction of these migratory bird populations.

Meanwhile, at home
in the U.S., insecticides are playing a role in the destruction of wildlife
and endangered species in other ways. According to the Thousand Oaks
Acorn, last year, the National Park Service found two mountain lions
ill from rodenticide poison in the Simi Hills of California. This according
to Bonnie Clarfield, National Park Service ranger. More recently, Vallerie
Coleman of the Monte Nido community in nearby Malibu Canyon found a
bobcat in her yard. The sick cat was also a victim of rodenticide poison.

"When predators
ingest toxic prey, they and their offspring are affected," Ms.
Coleman said. According to experts, the result is a dangerous, biologically
imbalanced environment. Reports show that rodents are becoming resistant
to some of the common anticoagulant rodenticides, so people are using
higher levels of poison to kill the pests. This trend is likely to become
even more dangerous to wildlife, pets and people.
Experts suggest some safe alternatives to pesticides.

The best defense
is prevention, sources say. Rats can enter structures through holes
the size of a quarter. Mice can enter structures through holes the size
of a dime. It is essential to seal holes and entry areas around the
house, under the house, in the garage and in hay sheds. It is also important
to clean up any areas that rodents can use for food or bedding: they
like warm cozy places and are attracted to fallen birdseed, fruit and
other food sources.

Experts also recommend
the use of physical controls such as Have-A-Heart box traps and snap
traps. Have-a-Heart traps are a good option, experts say, because rodents
can be released back into the wild, far from populated areas.

Snap traps that
are set correctly are very effective and more humane than poisons, experts
say. Glue-board traps don't kill mice and rats immediately and may catch
non-target species; therefore, snap traps, which are available at local
hardware stores, are the best alternative.

To get rid of gophers,
experts suggest that you use the "black hole," which is a
nontoxic method of control. The "black hole" is also available
at hardware stores.

"With a little
thoughtfulness and preventive action, we can protect our children, our
pets and all the wonderful wildlife that surrounds us," Ms. Coleman
said. "Unless we take active steps to protect and preserve our
native habitat, our grandchildren and the generations to follow might
never have the joy of seeing a bobcat, coyote or beautiful soaring hawk."